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SAFETY PRECASAFETY PRECA
SAFETY PRECA
SAFETY PRECASAFETY PRECA
SERSER
VICE VICE
SER
SERSER
Only qualified service technicians who are familiar with safety checks
and guidelines should perform service work. Before replacing parts,
disconnect power source to protect electrostatically sensitive parts. Do
not attempt to modify any circuit unless so recommended by the
manufacturer. When servicing the receiver, use an isolation transformer
between the line cord and power receptacle.
SERSER
SER
SERSER
Use EXTREME CAUTION when servicing the high voltage circuits. To
discharge static high voltage, connect a 10K ohms resistor in series with a
test lead between the receiver ground and CRT anode lead. DO NOT lift
the CRT by the neck. Always wear shatterproof goggles when handling
the CRT to protect eyes in case of implosion.
X-RAX-RA
X-RA
X-RAX-RA
Be aware of the instructions and procedures covering X-ray radiation. In
solid-state receivers and monitors, the CRT is the only potential source of
X-rays. Keep an accurate high voltage meter available at all times. Check
meter calibration periodically. Whenever servicing a receiver, check the
high voltage at various brightness levels to be sure it is regulating
properly. Keep high voltage at rated value, NO HIGHER. Excessive high
voltage may cause X-ray radiation or failure of associated components.
DO NOT depend on protection circuits to keep voltage at rated value.
When troubleshooting a receiver with excessive high voltage, avoid close
contact with the CRT. DO NOT operate the receiver longer than
necessary. To locate the cause of excessive high voltage, use a variable
AC transformer to regulate voltage. In present receivers, many electrical
and mechanical components have safety related characteristics which are
not detectable by visual inspection. Such components are identified by a
# on both the schematic and the parts list. For SAFETY, use only
equivalent replacement parts when replacing these components.
GENERAL GUIDELINESGENERAL GUIDELINES
GENERAL GUIDELINES
GENERAL GUIDELINESGENERAL GUIDELINES
Perform a final SAFETY CHECK before returning receiver to customer.
Check repaired area for poorly soldered connections, and check entire
circuit board for solder splashes. Check board wiring for pinched wires or
wires contacting any high wattage resistors. Check that all control knobs,
shields, covers, grounds, and mounting hardware have been replaced. Be
sure to replace all insulators and restore proper lead dress.
WARNINGWARNING
VICE
WARNING
VICE VICE
WARNINGWARNING
VICING VICING
VICING
VICING VICING
Y RADIAY RADIA
Y RADIA
Y RADIAY RADIA
THE HIGH THE HIGH
THE HIGH
THE HIGH THE HIGH
TION AND HIGH TION AND HIGH
TION AND HIGH
TION AND HIGH TION AND HIGH
VV
OLOL
V
OL
VV
OLOL
TT
AA
GE AND CRGE AND CR
T
A
GE AND CR
TT
AA
GE AND CRGE AND CR
VV
OLOL
TT
V
OL
T
VV
OLOL
TT
TT
T
TT
AA
GE LIMITSGE LIMITS
A
GE LIMITS
AA
GE LIMITSGE LIMITS
UTIONSUTIONS
UTIONS
UTIONSUTIONS
SAFETY CHECKS — FIRE AND SHOCK HAZARDSAFETY CHECKS — FIRE AND SHOCK HAZARD
SAFETY CHECKS — FIRE AND SHOCK HAZARD
SAFETY CHECKS — FIRE AND SHOCK HAZARDSAFETY CHECKS — FIRE AND SHOCK HAZARD
Cold LeakaCold Leaka
Cold Leaka
Cold LeakaCold Leaka
Unplug the AC cord, connect a jumper across the plug prongs, and turn
the power switch on (if applicable). Use an ohmmeter to measure the
resistance between the jumped AC plug and any exposed metal cabinet
parts such as antenna screw heads, control shafts, or handle brackets.
Exposed metal parts with a return path should measure between 1M
ohms and 5.2M ohms. Parts without a return path must measure infinity.
Hot LeakaHot Leaka
Hot Leaka
Hot LeakaHot Leaka
Plug the AC cord directly into an AC outlet. DO NOT use an isolation
transformer. Use a 1500 ohms, 10W resistor in parallel with a .15µF
capacitor to connect between any exposed metal parts on the receiver and
a good earth ground. (See figure below.) Use an AC voltmeter with at
least 5000 ohms per volt sensitivity to measure the voltage across the
resistor. Check all exposed metal parts and measure voltage at each point.
Voltage measurements should not exceed .75VAC, 500µA. Any value
exceeding this limit constitutes a potential shock hazard and must be
corrected. If the AC plug is not polarized, reverse the AC plug and repeat
exposed metal part voltage measurement at each point.
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or Receiveror Receiver
or Receiver
or Receiveror Receiver
kk
k
kk
s with Isolated Grs with Isolated Gr
s with Isolated Gr
s with Isolated Grs with Isolated Gr
oundound
ound
oundound
SET 4544SET 4544
SET 4544SET 4544
SET 4544
High Voltage Shutdown Test .................. 1
IC Functions ........................................... 1
Important Parts Information ................... 2
Miscellaneous Adjustments .................... 1
New Circuit ............................................ 1
Parts List ............................................. 7, 8
Placement Chart ................................. 5, 6
Safety Precautions .................................. 1
Schematic Component Location ............ 6
Schematic Notes ..................................... 2
Schematics
Test Equipment....................................... 2
Tuner Information .................................. 1
INDEXINDEX
INDEX
INDEXINDEX
Audio ............................................... 3
CRT ................................................. 3
PIP ................................................... 4
Power Supply .................................. 2
Surround Audio ............................... 5
System Control ................................ 1
Television ........................................ 2
Tuner ............................................... 5
Video Switching/Digital Comb ....... 4
Technical Service Data
PRPR
OSCANOSCAN
PR
OSCAN
PRPR
OSCANOSCAN
Model PS27152FX1 (Chassis CTC169CE5)Model PS27152FX1 (Chassis CTC169CE5)
Model PS27152FX1 (Chassis CTC169CE5)
Model PS27152FX1 (Chassis CTC169CE5)Model PS27152FX1 (Chassis CTC169CE5)
Representative Model
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hematicshematics
•
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hematics
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hematicshematics
veravera
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vision receivervision receiver
vision receiver
vision receivervision receiver
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...
......
4544
HIGH HIGH
VV
OLOL
TT
AA
HIGH
V
HIGH HIGH
VV
Apply 120VAC to set, turn set on, and adjust brightness and contrast to maximum. Short
XRP-1 to XRP-2. The set should shut down and then cycle on and off. If the set does not
shut down and then cycle on and off, the shutdown circuoit requires repair. To resume normal
operation remove the short from XRP-1 to XRP-2.
The listing of any available replacement part herein in no case constitutes a recommendation, warranty, or guarantee by
SAMS Technical Publishing as to the quality and suitability of such replacement part. The numbers of the listed parts have
been compiled from information furnished to SAMS Technical Publishing by the manufacturers of the specific type of
replacement part listed.
Reproduction or use, without express permission, of editorial or pictorial content, in any manner, is prohibited. No patent
liability is assumed with respect to the use of the information contained herein.
© 2002
5436 West 78th Street
Indianapolis, IN 46268-4149
Printed in the United States of America 5 4 3 2 1
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SET 4544 SET 4544
SET 4544
SET 4544 SET 4544
P
PP
GE SHUTDOGE SHUTDO
OL
T
A
GE SHUTDO
OLOL
TT
AA
GE SHUTDOGE SHUTDO
WN WN
TESTTEST
WN
TEST
WN WN
TESTTEST
02PF01843
UPC
HERE
4544
MODELPS27152FX1 (CHASSIS CTC169CE5)MODELPS27152FX1 (CHASSIS CTC169CE5)
MODELPS27152FX1 (CHASSIS CTC169CE5)MODELPS27152FX1 (CHASSIS CTC169CE5)
MODELPS27152FX1 (CHASSIS CTC169CE5)
OSCANOSCAN
OSCANOSCAN
OSCAN
PRPR
PRPR
PR
For Supplier AdFor Supplier Ad
For Supplier Ad
For Supplier AdFor Supplier Ad
See PHOSee PHO
See PHO
See PHOSee PHO
TT
T
TT
OFOF
OF
OFOF
AA
CT AnnCT Ann
A
CT Ann
AA
CT AnnCT Ann
dress,dress,
dress,
dress,dress,
ual Indeual Inde
ual Inde
ual Indeual Inde
xx
x
xx
Component locationsComponent locations
•
Component locations
Component locationsComponent locations
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ts list
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Coverage includes these additional models and chassis:
ModelsModels
Models
ModelsModels
PS27152JX1 CTC169CE5
PS27153FX1 CTC169CH5
PS27153JX1 CTC169CH5
FEBRFEBR
UU
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Y Y
FEBR
FEBRFEBR
U
2002 SET 4544 2002 SET 4544
AR
Y
2002 SET 4544
UU
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Y Y
2002 SET 4544 2002 SET 4544
ChassisChassis
Chassis
ChassisChassis
4544
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SET 4544 SET 4544
SET 4544
SET 4544 SET 4544
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TUNER INFORMATION
TUNER TUNER
TUNER
TUNER TUNER
PinPin
Pin
PinPin
1 (AGC) 5.4V 4.1V 7.9V
2 (+12V) 12.0V 12.0V 12.0V
3 (IF) 11.7V 11.6V 11.7V
4 (+33V) 33.0V 33.0V 33.0V
5 (-12.0V) -12.0V -12.0V -12.0V
6 (+5V) 5.0V 5.0V 5.0V
7 (SDA) 5.0V 5.0V 5.0V
8 (SCK) 5.0V 5.0V 5.0V
9 (NC) 0V 0V 0V
10 (LOGIC) 0V 0V 0V
11 (B+) 12.0V 12.0V 12.0V
Note: VHF Low Band voltages taken on channel 2.
VHF High Band voltages taken on channel 7.
UHF Band voltages taken on channel 14
VHF LoVHF Lo
VHF Lo
VHF LoVHF Lo
VV
OLOL
V
OL
VV
OLOL
w Bandw Band
w Band
w Bandw Band
TT
AA
GE CHARGE CHAR
T
A
GE CHAR
TT
AA
GE CHARGE CHAR
VHF High BandVHF High Band
VHF High Band
VHF High BandVHF High Band
TT
T
TT
UHF BandUHF Band
UHF Band
UHF BandUHF Band
TUNER TUNER
TUNER
TUNER TUNER
(2)
(4)
(6)
(8)
(10)
TERMINAL GUIDETERMINAL GUIDE
TERMINAL GUIDE
TERMINAL GUIDETERMINAL GUIDE
(1)
t
t
(3)
t
t
(5)
t
t
(7)
t
t
(9)
t
t
MISCELLANEOUS ADJUSTMENTS
t
(11)
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ImporImpor
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ImporImpor
ν The parts listed here are those not usually available from a well-stocked supply cabinet or bin.
ν Where items may be replaced with equivalent parts, several alternates are shown from participating vendors.
ν On the parts lists, safety items are marked with a
these items.
ν When ordering parts, state the model number, part number, and description.
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tant Ptant P
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# #
# to remind you that only exact replacements are recommended for
# #
ts Inf
ts Infts Inf
ormationormation
ormation
ormationormation
Obtaining PObtaining P
Obtaining P
Obtaining PObtaining P
Many of these parts are available from your local Sams authorized distributor or the manufacturer of the equipment. Call
Sams for the name of your nearest distributor:
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tsts
ts
tsts
800-428-7267
Or consult the Sams
Information on test equipment and replacement parts is listed in these pages for the following participating vendors.
Consult the Sams
ν NTE Electronics, Inc. (NTE)
Test equipment listed by participating manufacturer illustrates typical or equivalent equipment used by Sams engineers to obtain
measurements. This equipment is compatible with most types used by field service technicians.
Annual Index
Annual Index
for the address of the original equipment manufacturer.
PP
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ticipating ticipating
P
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ticipating
PP
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ticipating ticipating
for their current address.
TEST EQTEST EQ
TEST EQ
TEST EQTEST EQ
VV
endorendor
endor
endorendor
ss
s
ss
V
VV
ν Sencore, Inc.
UIPMENTUIPMENT
UIPMENT
UIPMENTUIPMENT
PR
PRPR
PRPR
OSCAN MODEL PS27152FX1 (CHASSIS CTC169CE5)
OSCAN MODEL PS27152FX1 (CHASSIS CTC169CE5)OSCAN MODEL PS27152FX1 (CHASSIS CTC169CE5)
OSCAN MODEL PS27152FX1 (CHASSIS CTC169CE5)OSCAN MODEL PS27152FX1 (CHASSIS CTC169CE5)
EquipmentEquipment
Equipment
EquipmentEquipment
Oscilloscope SC3100
Generators
RGB CM2125
Multiburst Signal VG91
Color Bar VG91
TV Stereo VG91
Digital VOM SC3100
Frequency Meter SC3100
Hi-Voltage Probe HP200
Accessory Probes TP212
Sencore No.Sencore No.
Sencore No.
Sencore No.Sencore No.
EquipmentEquipment
Equipment
EquipmentEquipment
Isolation Transformer PR570
Capacitance Analyzer LC102
CRT Analyzer CR7000
AC Leakage Tester PR570
Inductance Analyzer LC102
Flyback Yoke Tester TVA92
Field Strength Meter SL753
Transistor Tester TF46
Horizontal Analyzer HA-2500
Video Analyzer VG91, TVA92
Sencore No.Sencore No.
Sencore No.
Sencore No.Sencore No.
SET 4544 PSET 4544 P
SET 4544 P
SET 4544 PSET 4544 P
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